Embroiering machine



- Feb. 11, 1936. i M. BRETSCHNEIDER' EMBROIDERING MACHINE Filed Oqt. 20, 1950 7 Sheets-Sheet 1 Feb. 11, 1936.;

M. BRETSCHNEIDER EMBROIDERING MACHINE Filed Oct. 20, 1930 7 Sheets-Sheet 2 M. BRETSCHNEIDER 2,030,495

EMBROIDERING MACHINE Filed Oct. 20, 1950 7 sheets-sheet 3 Z v Z a f ,4" //&x 27%;; 0,121 We? .2 Mag y Feb. 11, 1936. M. BRETSCHNEIDER EMBROIDERING MACHINE 7 Sheets-Sheet 4 Filed Oct. 20, 1930 EMBROIDERING MACHINE Fil ed Oct. 20, 1930 7 Sheets-Sheet 5 Feb. 11, 1936.

M. BRETSCHNEIDER 2,030,495

EMBROIDERING MACHINE Filed 001;. 20, 1930 K '7 Sheets-Sheet 7 Patented Feb. 11, 1936 i UNITED STATES PATENT OFF-ICE Application October 20, 1930, Serial No. 490,027 In Germany October 24, 1929 Claims. (01. 112-86) The present invention relates to embroidering separating the needles individually from their machines of the multiple needle type, in which driving device during high speed operation and the fabric to be embroidered is held by a vertistopping themif a thread is broken to thread the --cal ly and horizontally adjustable frame and the yarn again. According to the invention, the

5 needles are moved to and fro horizontally, and needles are therefore secured to needle bars has for its object to provide improvements which which are individually removably connected with considerably increase the working speed of such the rod serving as driving means and which are machines. fixedly positioned on the machine frame.

For this purpose the frame is supported in a In this way the repeat can be changed easily novel manner by suspending its struts and side by disengaging the needles that are not wanted 110 parts horizontally displaceably from an au-Xilor by reconnecting needles that were previously iary bar held by carrying means, such as steel disengaged with the driving rod. Moreover, in bands and the like, which can be vertically adfancy embroidery work differently colored threads justed by the automatic device. By suspending may be inserted in the needles ina certain order 1.5 it in this way the frame is prevented from oscilto work only needles with threads of the same 11.5 lating in response to the intermittently acting color and to replace them'by others with differ- .adjusting forces and from interfering with the ently colored threads after finishing the particuwork of the needles. The new suspension comlar portion of the work. As the needles canbe pletely excludes bending strains of the longitudiseparated from the driving rod even during-high nal carriers of the frame, which need not be speed operation, the masses to be disengaged are rigid any more. reduced to a and shocks otherwise un- In connection with the new frame suspension avoidable during starting and stopping elimi- -other improvements are provided in order to nated.

utilize the great working speed of embroidering The drive of the other embroidering tools, and e machines to its fullest extent. To insure good particularlyof the bore tools, presser tools, thread balancing of weights and masses, two frames of guides, as well as the braking device must be the kind characterized are arranged on both sides adapted to :the speed of the needles, it being of the supporting machine frame in such a way especially necessary to prevent the presser tools that one of themalwaysmoves oppositely to the from striking the fabric at full speed as is now 39 other in vertical direction and both .are always the case and to cause them to move intermittently 0 moved uniformly in horizontal direction, the by being first placed softly on the fabric, stopped.- needle driving rods being disposed on the outer for a moment, and then tensioned by being exsides of the machine and the shuttles between posed to the action of springs which press them the two frames so that all mass forces relative against the fabric. In this manner the otherto the horizontally reciprocating motions of the wise unavoidable noise and the excessive streSS- embroidering tools balance each other and are ing of the fabric owing to the impact of the thus kept away from the machine frame. In presser tools are eliminated and perfect operaorder to transmit reliably the horizontal adjusttion of the machine becomes possible. ing forces to all parts of the frame, the side por- One embodiment of the invention is illustrated tions of the latter are guided vertically-.adjustin the accompanying drawings, in which Figure 4 ably by two members which, by means of steel 1 is a front view of a part of the embroidering bands, can be adjusted according to pattern and machine and of the frame suspension in particudrawn apart to keep the frame tensionedso that lar; Fig. 2, a supplementary view to Fig. 1 show- I greater accelerating forces cannot cause harming the other part of the embroidering machine; ful vibrations of the frame parts and displace Fig. 3, a vertical section of the embroidering thereby the fabric to be embroidered. The admachine; Fig. 4, an end View of the machine justment of the two frames .of an embroidering frame with the gear required for the lateral admachine by means of steel bands guided over justment of the frame; Fig. 5 is a fragmentary circular discs makes it possible to transmit adside view showing the band suspension for the justing motion so as to exclude oscillation. Furcarrier members; Fig. 6, an end view of aportion thermore, the frame can be adjusted very acof Fig. 5; Fig. 7, a topview partly in section curately by disposing the changing shaft with showing two carrier members connected together; the adjusting wheels inside the embroidering Figs. 8 and 9, detail views of modifications of the machine. frame support; Fig. 10 is a side view of the (em- It is further necessary to provide means for broidering tools in their relative position to one 5.5

another; Fig. 11, a side view of the needle drive; Fig. 12, a ground plan of the auxiliary shaft drive; Fig. 13, a ground plan of the needle driving rod; Fig. 14, a view of the control slide in disengaging position; Figs. 15 to 17 are explanatory ground plans of the needle drive, Fig. 15 showing it in drawn back position, Fig. 16, in advanced position, and Fig. 17 after separation from the driving rod; Fig. 18 is a. section of the coupling parts on the line AA, Fig. 17; Fig. 19, a side View of the bore tool drive after disengagement; Fig. 20, a side view of the bore tool drive after engagement; Fig. 21, a ground plan of the guiding parts for the joint of the toggle for the bore tool drive; Fig. 22, a View of the cam for adjusting the guide path for the toggle joint of the bore tool drive; Figs. 23 to 25 are detail views of the presser member with its drive in various positions; Fig. 26 is a front view of the presser member; Fig. 27, a side View of the thread guide drive; Fig. 28, a front view of the thread guide drive; and Fig. 29 is a fragmentary side view partly in section showing the carrier member with its track I4 and a strut with cooperating roller taken on line 29-29 of Fig. 9.

Referring to the drawings, the machine frame comprises a plurality of gate-like pedestals interconnected by longitudinal girders and large enough to permit attendants to pass through them. The pillars I bear the arch-shaped carriers 2 which support the pedestals 3 for the pairs of discs 4 for suspending two frames. The two discs 4 of a pair are rigidly secured to their supporting shaft 5 which is provided also with the toothed wheel 6 between the discs, the toothed wheel 6 being considerably larger than the discs 4 to obtain greater accuracy in the adjustment of the latter. All toothed wheels engage the pinions 7 which are divided to eliminate play and carried by a continuous shaft 8 positioned in the upper part of the machine frame and serving as changing shaft, the shaft 8 carrying therefor the two adjusting wheels BI and 82 connected by a decimal gear. The two adjusting wheels 81 and 82 are adjusted according to pattern in the usual Way by means of an automatic device of suitable type and racks, the ratchet teeth being positioned on the machine frame and actuated in the known manner by the automatic device by means of rods. The transfer of the adjusting wheels BI and 82 from the domain of the automatic device to that of the embroidering machine represents a. considerable step forward especially with respect to accurate adjustment of the frame. The new construction of the frame per se does not require any alteration of the automatic device, and only the adjusting wheels, which are otherwise controlled in the usual way by the gear of the automatic device, are supported by the machine frame instead of by the weak casing of the automatic device. The changing shaft is thus made a part of the embroidering machine so that ratchet teeth engaging the adjusting wheels 8! and 82 during the embroidering operation transmit the reacting forces directly to the firm machine frame and oscillations of the embroidering frame are prevented. The transfer of the adjusting wheels 8| and 82 requires therefore nothing else but an extension of the racks engaging the adjusting wheels so as to make them reach the wheels. The place of installation of the automatic device may be chosen at will, the adjusting wheels being preferably arranged vertically above the automatic device, though a certain latitude is left in this respect.

The discs are engaged by the carrying bands 9 passing over the idlers H] which are supported by levers, the adjustment of which permits hdrizontal straightening of the frame and its carrier members 14 secured to the free depending ends of the bands 9 which, for this purpose, are each provided with a bearing block l2 for a hinge bolt 13. The carrier members l4 suspended from sets of two hinge bolts is can be straightened by raising or lowering the idlers I0 so that their upper edges are in alinement. To prevent the bands 9 from slipping 01f from the idlers I0 during high speed operation, the idlers are provided with guide pins and the bands with perforations adapted to engage the guide pins, or the idlers may be fitted with a lateral flange.

Each carrier member 14 supports by means of a roller l5 a frame strut l 6, except the end member which supports a side portion ll, of the frame, the struts l6 and the side portions I? being bent in opposite directions. The members l6 and I! are connected at their upper and lower ends by the longitudinal girders, for instance, continuous tubes [8 and I9 which maintain the proper distance between the members and transmit to them the horizontal adjusting motions, which will be explained later on. The side portions ll of the frame carry also the fabric rollers 20 which are further supported by the struts l6 by means of the curved supports 2|. However, while the upper roller is maintained in position merely by a support at the bottom thereof, it is necessary to depart from the usual method relative to the lower roller and to arrange pairs of spoon-shaped or curved supports so as to protect the roller 2|] against deflections in upward and downward direction, which thus cannot be bent or oscillated either by its weight or the tension of the fabric 22. The supporting devices are the rollers l5 which are mounted on the upper end of the struts l5 and the side portions l1. These supporting devices I5 are supported on the carrier members, that is on the tracks or carrier members M. The latter are carried by the suspension device, namely, the steel bands 9 and the band discs or idlers ID.

The curved supports 2| for the fabric rollers must be vertically and horizontally adjustable to bring the fabric at uniform. tension into proper position relative to the embroidering tools.

The frame parts are guided in the known manner by means of the guide rods 23 secured to the frame, and the frame struts 16 are provided with corresponding guide rolls which can be adjusted to set the frame always so that the fabric 22 held between the fabric rollers 20 can be passed freely between the embroidering tools.

To permit lateral adjustment of the frame, the tubes l8 and H) are either extended over the side parts I! of the frame and provided on their free ends with the idlers 24 or the latter are secured to special brackets 25 attached to the side parts ll of the frame, as shown in the drawings. The

idlers 24 lean against the vertical adjusting members 26 which are guided horizontally displaceably on the machine frame and provided for this purpose on their upper and lower ends with the rollers 21 which guide the adjusting members 26 along the rails 28 carried by the machine frame.

Furthermore, the upper and lower ends of the adjusting members 26 are engaged by the steel bands 38 guided over the idlers 3| to the discs 32 in such a way that the turning of the latter causes the adjusting members 26 to be displaced parallel to one another and towards one side or the other. Fig. 4 shows that the upper end of the adjusting member 26 is engaged by only one steel band 30,

the lower end, however, by two correspondingly narrower bands symmetrically disposed relative to the upper band to prevent twisting of the frame. The pulleys 32 are each arranged loosely rotatably on a pair of brushes 95 provided on the machine frame and serving as bearing for the main driving shaft 96 of the embroidering machine, each disc 32 being firmly connected with a disc 34. It is important to keep the bands 30 short and the discs 32, 34 near the frame so that longitudinal oscillations or rotations of the bands 30 have no appreciable influence on the adjustment of the frame and the latter can be reliably adjusted without vibration according to the rotation of the discs 32. Far-going elimination of the influence of expansions and vibrations of the machine parts has been aimed at also by suspending the frame by means of the steel bands 9 and by moving the latter by the wheels 6.

The two discs 34 of a frame are interconnected by a steel band 35 in such a way that the band 35 transmits an adjusting motion of one disc to the other. One disc is rotated by the automatic device according to pattern and, according to Fig. 4, connected for this purpose with a gear 90 engaged by a divided pinion 9I adapted to be adjusted to eliminate play. The pinion 9| is disposed on a changing shaft 92 carrying the two wheels 93 and 94 which are rotated in the known manner by the automatic device and connected by a decimal gear.

The steel band 35 is guided over two rolls 36 and '31, the roll 38 being stationary on the machine frame and the other one carried by the lever 39 movably positioned on the shaft 38. The free end of the lever 39 carries the Weights 98 by means of the rod 91 to keep the steel band 35 tight. This tension has the additional effect of drawing apart the two adjusting members 26 between which a frame is arranged so that play in the lateral adjustments of the frame is excluded. Instead of tensioning the steel band 35 by the weights 98, a spring of any suitable kind could be used or a part of the steel band could be replaced by a spring. Or the steel band can be dispensed with entirely by causing each of the two discs 34 to be engaged by a weight or a spring so as to draw apart the adjusting members with sufficient force to insure a reliable frame adjustment at high operating speed. Furthermore, instead of transmitting adjusting force from one disc 34 to the other and to include the frame in this transmission system, both discs 34 could be rotated correspondingly by a special continuous adjusting shaft.

The rack mechanism 60 prevents upward motions and thereby oscillations of the lever 39; the mechanism could of course be replaced by an oil damping device, a mechanical braking gear or the like.

The arrangement described can be altered also in other respects and within wide limits, and the drive of the frame in vertical direction can be simplified with particular ease. It is not necessary that each hinge bolt I3 of the carrier members I4 be moved by a separate gear 6. According to Fig. 8, several supporting shafts 5 of the band discs 4 may be combined into a common shaft to turn a common gear 6 so that only a few of such adjusting wheels are required while any number of steel bands in any desired spaced relation to one another may be provided for the carrier members 4. The length of the supporting shafts and the number of band discs 4 secured thereto should be chosen with a view to exclud ing completely the formation of vibrations, and the various supporting members should be dimensioned accordingly as to thickness. A further possibility of simplifying the frame drive is shown in Fig. 9 where the carrier members I4 are made so long that they accommodate several frame struts I6, the various path portions I4 being adjustably attached to the carrier members I4 so that the upper edges of the paths can be alined horizontally. The various members I4 must be dimensioned in this case, too, with a view to preventing excessive sagging and vibrations of the frame resulting therefrom. The length of the path members must be adapted to the changing range of the frame.

The needles IOI are each secured by a clamp screw to individual needle bars I02 in the manner usual in sewing machines, the needle bars being displaceably arranged in the bridge-like bearing bars I04 and I05 of the machine frame. The shuttles operating with the needles are arranged on shuttle carriers or shuttle bars IOI.

In order to coup-1e the needle bars I02 individually with the driving bolt I03, each needle bar is provided with two oppositely disposed and relatively fiat notches I06 for the reception of the two rolls I'I which are carried by the levers I08 and are drawn toward one another by means of the small spring I09 so that these coupling members do not exert lateral pressure on the bearings of the needle bars which are thus fully relieved outwardly. Each of the levers I08 is rotatable about a vertical axis and secured to the driving rod I03 which, for this purpose, is provided with the correspondingly distributed ears 300.

A needle bar I02 can be readily separated from the driving rod I03 by pushing apart the two rolls I0'I. To this end an adjusting slide III is positioned above each needle bar on the machine frame and provided at its lower edge with a projecting tongue I I2 correspondingin yvidth to the diameter of the needle bar I02. When this tongue [I2 is driven between the two rolls I0'I, according to Fig. 18, they cannot engage the notches I06 of the needle bar and fail to catch the latter. To permit separation of the needle bars I92 from the driving rod I03 only when the former are in returned position, the tongue II2 overlaps in the advanced position shown in Fig. 1'7 the rear path of the rolls I0'I only. If the rolls ID! are within range of the tongue II2, the latter presses them out of the notches I06 so that the rolls I01 can come into contact with the needle bars I02 only during the next advance outside the range of the notches I05, the rolls moving inactively along the needle bars without engaging them. On the return of the tongue I I2 the rolls I0I can engage again on their return the notches I06 of the needle bar I02 and carry the latter along. This arrangement affords the advantage that each needle bar, on striking a point in the fabric that is hard to pierce or in case of direct contact between needle and needle plate, automatically disengages itself from the driving device without causing the needle to break and damaging the fabric. To limit the path of the needle bar rearwardly and thus keep the notches I06 within range of the rolls I0'I, each needle bar is provided with an adjusting ring II3 which butts against the guide bar I and the interposed buffer plate I I4 consisting of a soft material, such as, for example, rubber or felt. The general arrangement provides that the pressing these pawls. employing clamps or pawls for connecting the rolls I07 follow the adjusting ring I I3 when pushed apart and, the moment a needle bar is disengaged, press it so closely on to the bar I05 that the locking bolt II5 can engage the notch .I I! of the needle bar, the needle bars I02 being secured against rotation during operation by the rolls I07. In a position of rest the bars are secured .against rotation by the tongues I I2 which engage a clearance of the adjusting ring H3.

These means may be replaced or supplemented by others; for example, .each needle bar I02 may have a groove 2I0 and the corresponding guide rail I04 a guide bolt 2| I.

order to protect the needle bar I02 after disengagement against being driven by the rolls I07 of the driving rod I03, the bar I05 is provided with a locking bolt I I5 for each needle bar, the bolt engaging by means of the spring IIB a small notch II! of the needle bar as soon as the latter is pushed back, as shown in Fig. 1'7. The bolt I-:I5 does not interfere in any way with the driving'of the needle bars I02 after their attachment to the driving rod I03, since it is pushed laterally out of reach of the needle bar by the rear end of the tongue IIZ after the needle bar has become engaged.

Instead of arranging the coupling members connecting the needle bars with their driving rod 3 on both sides of the latter, pawls of the ordinary type could be caused to engage recesses in the needle bars from below. These pawls' could be made from laminated springs, one end .of which would be secured to the driving rod and the other one bent vertically upwardly. Disengagement could then be effected simply by de- Furthermore, instead of needle bars I02 with the driving rod I03, springactuated and rectilinearly guided carriers, slides, belts, :or other, coupling means could be used which would have to cooperate with the adjusting members of the machine frame in such a way that they could be actuated by the latter during operation. For this purpose one of the cooperating members would have to act as running-on bar for the others.

'The reciprocating motion of the driving rod I 03 can be controlled in various ways from the main shaft I20, the simplest way being to drive it directly by eccentrics positioned on the shaft I and balanced by counterweights. The shaft I20 is to be disposed in the needle blocks of the machine in the immediate neighborhood of the driving rod I03 and on a level with the latter, -but in the modification shown in the drawings the connecting rod between the eccentrics and the driving rod I03 is provided as short as possible in order to approach as closely as possible the needle bar drive used in sewing machines. "To this end the guide shoes I2I by means of which the driving rod I03 is maintained in posi- .tion relative to the guide rods I 22 secured to the machine frame extend up to the eccentrics I23 secured to the main shaft I20. The connecting rod I24 unites the eccentric strap I25 with the guide shoe I2 I, and in order to guide the bolt I26 exactly on a circle, the following arrangement has been made:

.On the main shaft I20 the eccentrics I 23 are always disposed in pairs side by side and staggered 90 relative to one another. They drive an auxiliary shaft I 27 with two cranks also staggered at 90 relative to one another and connected with the two eccentrics I23 by means of the two rods I20, the crank I27 driving no machine part but running idle; however, in order to prevent mass actions resulting from its drive to become effective outwardly, it is preferably provided with the eccentric weights I29. Instead of using the auxiliary crank I27, one could provide any suitable type of guide for the guide rod I28 attached to the eccentric strap I25, or the connecting rod I24 could be rigidly united with the eccentric strap I25 or cranks could be employed instead. On account of the elimination of the intermediate gears, especially of the oscillating shafts, usually employed for driving the driving rods for the needles, great working speed and vibrationless running of the machine are attained. For the same reason the driving rod I03 is composed of a plurality of relatively short,

and connected at its front end with the tongue v I I2 extends vertically and possesses at its rearward'end a handle I I8 by means of which it can be adjusted by hand during operation of the machine. At its lower edge two notches II9 are provided for locking it in any desired position by means of the pin I70 attached to a shield I7I which is positioned on an adjusting shaft I72 adapted to be moved by hand or by the automatic device through the medium of the bar I73 and the lever I 74 secured to the shaft I72, so that all slides III can be moved forward and backward simultaneously and all needle bars I02 simultaneously connected with, or disconnected from, the driving rod I03, the work of the machine being temporarily interrupted in the latter case without stopping the machine drive. stead of one adjusting shaft I72 a plurality of them may be provided for uniformly engaging and disengaging groups of needles in a certain order, an arrangement which, for example, would be important relative to the change of repeat and the general carrying out of fancy embroidery work. Each slide III has also a recess I75 through which passes a second pin I76 on the shield I7-I, which serves the purpose of keeping the slide III within range of the pin I70. essential that during the manual or automatic engagement or disengagement of the needle bars the particular manually made adjustment of the the bore tool drive, in addition to the needle.

drive, as cam drive should be avoided. What has been said about the needle drive, applies, therefore, in the main to the bore tool drive also, while it should be observed that the bore tools are to be positioned not below the needles, as is usual, but between them in order to make the employment of circular shuttles possible.

The bore tool rod I30 is subdivided many times like the needle driving rod and, according to Figs. 19 and 2.0, displaceably arranged with its shoe I3I on the guide rods I22. Each guide shoe I3I is engaged by means of the bolt I32 by a toggle drive I33, I34, and the toggle arm I34 secured to an eccentric strap I35 surrounding the eccentric I36 connected with the main shaft I20.

The hinge bolt I37 of the toggle I33, I34 carries on each of its ends a block I38 guided in one or firmly connected with one another by the bow or frame I40 and movably supported on the machine frame by means of the pins I4 I. The links I39 are shaped so that they form an are around the hinge pin I32 of the toggle portion I33 in the position shown in Fig. 19 and during the rotation of the eccentric I36 the hinge pin I31 of the toggle I33, I34 is reciprocated on an arc portion about the pin I32 without, however, transmitting any motion to the latter and thus to the bore tool rod I30. In this way, all driving parts of the bore tool rod with the exception of the bore tool rods themselves are moved continually, whereby the bore device is prevented from sticking after having not been used for some time and from being broken as a result thereof on being started again. The wear is very slight, as the driving parts are relieved. On the other hand, if the cam portions I39, I40 are moved into the bore position shown in Fig. 20, the pin I31 is, during the rotation of the eccentric I36, guided so that a corresponding sliding motion of the bore tool driving rod results therefrom without requiring a special control step as in the known types of embroidering machines. The displacement of the cam portions I39 takes preferably place when the pin I31 is approximately or exactly positioned in the axial direction of the pins I4I so that the change can be effected with little resistance.

The adjustment of the bore tools as to depth is made by means of a cam I42 engaged by a guide pin I43 on the cam portion I39. These cams I42 are formed so as to permit rapid advance of the bore tools towards the fabric by means of only four steps so that eight of the usual twelve steps can be applied to the regulation of the, depth of penetration. All cams I42 arrangedalong the embroidering machine for the purpose of regulating the depth of penetration of the bore tools are disposed on an adjusting shaft I44 which runs parallel to the shaft I20 and uniformly moves all bore tool driving devices. The shaft I44 is displaced in the known manner by an automatic device.

The presser members I for the fabric are secured in the usual way to the bar I5| screwed to the bosses of the levers I53, any number of which may be carried by the shaft I52 rotatablyarranged on the needle block. The levers I53 are engaged by the springs 530 tending to pressthe members I50 on to the fabric I60. The free end of each lever I53 is connected by the bolt 53I with a double-armed auxiliary lever 532, one arm of which carries the regulatable setting screw 533 adapted to hug a lateral projection of the lever I53, while the other arm of the lever 532 carries the roll I56 which is kept in permanent contact with the cam I54 by the action of the spring I55 which engages the lever 532, the cam I54 being firmly located on the main shaft I20.

According to Fig. 23, the lever 532 when in a position of rest is depressed by the cam I54 to such an extent that the screw 533 hugs the lever I53 and depresses it so that the presser members I50 are lifted off from the fabric I60. During the rotation of the shaft I20 the lever 532 is raised at first only far enough to cause the presser members I50 to come in contact with the fabric I and to remain for a moment in a position of rest. The cam I54 contains therefore a short concentric arc portion between the cam portions I51 and I58 which move up the lever 532. By means of the cam portion I58 the lever 532 is finally adjusted so that the set screw 533 is out of contact with the lever I53 which is thus exposed to the action of the spring 530 which presses the members, I50 against the fabric I60 and thus the latter on to the needle plates I6I. Owing to the intermittent motion of the presser members I50, the otherwise unavoidable impact on striking the fabric is completely eliminated. Furthermore, the lever system described insures also constant good contact between the roll I56 and the cam I54.

' According to Figs. 27 and 28, the thread guides I63 are secured to the bar I64 carried by the levers I 65 which are connected with the shaft I66 carrying also the driving levers I61. Each of these is engaged by a rod I68, the free ends of which are provided with the bolts I69 engaging with one end the cam 200 on the main shaft I20 and with the other, the link 20 I. At the rotation of the cam 200 the pin 202 is thus moved up and down in the link 20I which can be moved at its top about the pin 202 arranged on the machine frame. The bolt 203 provided at its lower end is engaged by the adjusting rod 204, the other end of which is disposed on, and guided by, the shaft I44 serving for adjusting the bore tool drive, and adjusted by a cam 205 arranged there on so that the engagement and disengagement of the bore tool drive is followed by a corresponding adjustment of the thread guide drive, the shaft I44 being controlled by the automatic device.

The link 20I is shaped like an arc, the radius of which corresponds to the rod I68. When brought into the position shown in Fig. 2'1 where s it forms an are about the lower end of the lever I61, no motion is transmitted to the thread guides I63 during the ascent and descent of the pin. I69. On the other hand, if the link 20I is obliquely adjusted by the turning of the shaft I44 and the cam 205, the motion of the pin I69 along the link 20I will bring about a motion of the thread guides I63, the extent of the said motion depending on the adjustment of the cam 205. The adjustment of the link 20I is preferably effected when the pin I69 is exactly or approximately positioned in the axial direction of the bolt 202 of the link in order to keep the adjusting resistance down to a minimum.

I claim:-

1. In an embroidering machine the combination of a reciprocating rod with needles, a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered andconsisting of longitudinal girders, side portions and struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, supporting devices on the said frame struts and side portions, carrier members adapted to support the said struts and side portions of the said frame, a suspension device carrying the said carrier members and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

2. In an embroidering machine the combination of a reciprocating rod with needles, with a carrier bar with'shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered, the said frame consisting of longitudinal girders, side portions and struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, supporting devices on the said frame struts and-side portions, articulated carrier members adapted to support the said struts and side portions of the said frame, a suspension device carrying the said articulated carrier members at their joints and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

3. In an embroidering machine the combination of a reciprocating rod with needles, with a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portions and struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, supporting devices. on the said frame struts and side portions, articulated carrier members adapted to support the said struts and side portions of the said frame, steel bands carrying the said articulated carrier members at their joints, adjusting discs to which the free ends of the said steel bands are connected, a plurality of supporting shafts coaxially arranged on the machine and adapted to carry the said adjusting discs, driving wheels carried by the said shafts, a shaft passing through the entire embroidering machine, small toothed wheels disposed on the said shaft and adapted to rotate the said driving Wheels, and, an automatic device adapted to adjust the said continuous shaft.

4. In an embroidering machine the combination. of a reciprocating rod with needles, with a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portions and struts connecting thesaid longitudinal girders and serving as bearing for the fabric rollers, supporting devices. on: the said. frame struts and side por tions, carrier members adapted to support the said struts and side portions of the said frame, a plurality of members connected with each carrier member and adapted to be adjusted relative toone another, a suspension device carrying, the said, carrier members and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

5.. In an embroidering. machine the combination of two oppositely disposed rods with. needles adapted to be reciprocated in opposite direction to one another, two bars with shuttles arranged between the said needle rods and adapted to cooperate With the needles, fabric rollers, a frame at each, needle rod for fixing therein the fabric to be. embroidered and. consisting of longitudinal' girders, side portions and. struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, supporting devices on the said frame struts and side portions, carrier members adapted to support the said struts and side portions of the said frame, a suspension device carrying the said carrier members and adapted.to bear the weight of the said frame, and an automatic. device adapted to adjust the said suspension device, the said frames being suspended at the two needle rows to balance each other and to move oppositely to each other in vertical direction and in the same way in horizontal direction.

6. In an embroidering machine the combination of a reciprocating rod' with needles, a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portionsand struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, spoon-shaped means adapted to hold the lower fabric roller upwardly and downwardly relative to the frame, supporting devices on the said frame struts and side portions, carrier members adapted to support the said struts and side portions of the said frame, a suspension device carrying the said carrier members and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

'7. In an embroidering machine the combination of a reciprocating rod with needles, a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portions and struts connecting the said longitudinal girders and serving as hearing for the fabric rollers, guiding means on the side portions of the said frame, adjusting means adapted to guide the side portions of the said frame in vertical direction, guiding means on the machine frame adapted to horizontally guide the said adjusting means, drawing devices adapted to engage the upper and lower end of the said. adjusting means to draw them apart, supporting devices on the said frame struts and side portions, carrier members adapted to support the said struts and side portions of the said. frame, a suspension device carrying the said carrier members and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

8. In. an. embroidering machine the combination of a reciprocating rod with needles, a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to beembroidered and consisting of longitudinal. girders, side portions and struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, guiding means on the side portions of the said frame, adjusting meansadapted to guide the side portions of the said frame in vertical direction, guiding means on the machine frame adapted to horizontally guide the said adjusting means, drawing devices adapted: to engage the upper and lower end of the said adjusting means to draw them apart, steel bands making up the said drawing devices, adjusting discs connected with the free ends of the said steel bands, the said adjusting discs-being interconnected by steel bands, and an automatic device adapted to rotate the said adjusting discs.

9. In an embroidering machine the combina tion of a reciprocating rod with needles, with a carrier bar with shuttles cooperating with the needles, fabric rollers, av frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portions and struts connecting. the said longitudinal girders and serving as bearing for the fabric rollers, supporting devices on the saidframe struts and side portions, articulated carrier members adapted to support the said. struts and side portions of the said frame, steel bands carrying the said articulated carrier members at their joints, adjusting discs to which the free ends of the said steel bands are connected, a plurality of supporting shafts coaxially arranged on the machine and adapted to carry the said adjusting discs, driving wheels carried by the said shafts, a shaft passing through the entire embroidering machine, small toothed wheels disposed on the said shaft and adapted to rotate the said driving wheels, a differential gear arranged on the continuous shaft supported on the machine frame, driving means for moving the wheels of the differential gear, and an automatic device adapted to adjust the said driving means.

10. In an embroidering machine the combination of a reciprocating rod with needles, a carrier bar with shuttles cooperating with the needles, fabric rollers, a frame for fixing therein the fabric to be embroidered and consisting of longitudinal girders, side portions and struts connecting the said longitudinal girders and serving as bearing for the fabric rollers, carrier members adapted to support the said struts and side portions of the said frame, a suspension device carrying the said carrier members and adapted to bear the weight of the said frame, and an automatic device adapted to adjust the said suspension device.

MAX BRETSCHNEIDER. 

